Electronic lock



FIG. 1 is a perspective view of an electronic lock showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines shown in the figures are for illustrating environmental subject matters that form no part of the claimed design. 

CLAIM The ornamental design for an electronic lock, as shown and described. 